Monday, May 21, 2012
Bad vibes: Troubleshooting a vibration
Lately, I've noticed that above 60 MPH I'm getting a nasty vibration—it shakes the whole truck. I'm not getting any steering wheel wobble; the whole darn thing just starts to shake. It's so bad that anything over 65 becomes unbearable. And although I don't drive it very often about 60, when I want to take it on longer trips for camping, exploring, etc., it's super annoying.
I took the trucklet into the shop that originally mounted and balanced the wheels and tires to make sure I hadn't thrown a weight, etc. It was going to cost me $25, but at least it'd eliminate a variable. The tire tech said the wheels were slightly off, and the tires were starting to show their age. Fine.
After the re-balancing, I took the rig up to 60+ MPH, and sure enough, the vibration was still there. Drat.
Last night, I rotated the wheels/tires front to back and took the truck up to 60 MPH again, and sure enough, the vibration was still there. Double drat.
I've pretty much ruled out the wheels or tires being the issue. So it's onto other things like the u-joints, which is likely what I'll have checked next. Other possibilities could be an off-balance drive shaft, perhaps a broken mount of some sort; who knows what else. I hope to have it fixed soon, since I plan on attending the Overland Rallies and Workshops event outside of Leavenworth, WA in July.